Improvement in feed-water heaters and pumps



58 A. T. WEN

FEED WATER HEATER AND PUMF.

Patented. Jan. 25,1876,

finial/55554 )5 52755515 2 r N,FETERS, PHOTO-LITNOGRAPHER, WASHINGTON. D C.

'NTTED STATES PATENT OFFICE.

JOHN A. T. OVEREND, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN FEED-WATER HEATERS AND PUMPS.

Specification forming part of Letters Patent No. 172,580, dated J annary 25, 1876; application filed September 29, 1875.

To all whom it may concern:

Be it known that I, JOHN A. T. OVEREND, of the city and county of San Francisco and State of California, have invented a new, useful, and Improved Heater and Condenser, in connection with an Improved Double-Acting Hollow Plunger-Pump; and do hereby declare the following to be a full, perfect, and com plete description of the same,. with reference to the drawing for illustration.

Figure 1 of the drawing is a sideelevation, in section, showing the condensing-chamber and heater, the pump-cylinder and piston with the pipes and openings.

The object of myinvention is to construct a simple, cheap, and durable heater, condenser, and pump combined, requiring but very little power to operate it, and saving a large per cent. of fuel and water, by mingling the exhaust steam from engines directly with the cold feed-water, thereby heating the feedwater and condensing the exhaust steam, and forcing, with the pump, into the boiler a sufficient quantity of water thus obtained to supply it at about 212 of heat.

In my invention, referring to the drawing, A shows a cylinder, with cops adjusted, and its inside pipe B set in the center of the heads, held by the grooves b, cast in the inner part of the heads. This pipe is provided with the openings 0, four or more in number, above the water-line in the condensingchamber, which allows any surplus steam or water to flow into it' and be drawn off through the pipe 6. 0 shows the exhaustpipe from the engine, with the feed-pipe connecting it about four feet from the condensing-chamber, more or less. D shows the exhaust discharge-pipe from the condensingchainber, to carry off the exhaust steam not condensed. 01 shows the opening in the condensing-chamber and heater leading to the pump. E shows the pump complete. The cylinder is connected to the condensing chamber by flange or pipe. The

heads are provided with cones on the inner surfaces f f, which are a little smaller than the hollow ends, and which displace any air, Water, or vapor, and ease the stroke of the pump-piston to give clearance.

h it show the branch discharge-pipes forming the main discharge-pipe F. I is a branch. pipe leading back to the condensing'chamber from the main feed-pipe, in which surplus water not needed for the boiler is returned to the heater and condensing-chamber. The check-valves s s on the pipes h it hold the water during the strokes of the piston. vI construct the piston of this pump of suitable metal, hollow at both ends, with the piston-rod connected in the middle throughthe solidpart,

held by the nut N. P represents the piston, which is about one-half the length of the cylinder inside, and, when working, passes the inlet d. from the condensing-chamber, to allow the water to fill the end of the cylinder not then occupied by the piston, and which, on the return of the piston, is forced through branch pipe 0 into the main dischargepipe F to the boiler, and on its descending stroke, in the same manner, through branch pipe. 7

The exhaust steam passes into the condensing-chamber and heater through pipe 0. The feed-water enters this pipe, also, through pipe t, regulated in quantity sufficient to feed the boiler by cock I. In this way the cold feedwater comes in direct contact and mingles with the exhaust steam, which drives it into the condensingehamber and heater, heating the water and condensing the steam. This feed-water--part cold water heated, and part steam condensed-is. then forced into the boiler at about the heat before mentioned, in the manner already described.

I can use this pump separate from the condensing-chamber and heater, if desired, for pumping cold wateror liquids; and I also use it for a hand-pump as well as by power.

I have adopted this style of pump and heater, and use it outside the condensingchamber, and prefer itto that previously made by me, and patented July 20, 1875, and in my type-casting machine patented February 18, 1873, reissued June 22, 1875.

, Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination, in a pump, 'of the two outlet-pipes h, provided with check-valves S, haust and feed pipesvO, D, and 1, opening d, the single inlet 01 in the center of the cylin interior pipe B, withits openingsG and e, for

der, and the piston P, hollow'at both ends, the purposesrhenein (lescribedand claimed. substantially as and. for the purposes set J. A. T. OVEREND.

forth. Witnesses 2. In combination with the pump, the con- 1?. G. WOOD, (lensing-chamber A, provided with the ex- R. AsH. 

